// Copyright 2015 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package config

import (
	"encoding/json"
)

func IsIgnitionConfig(userdata string) bool {
	var cfg struct {
		Version  *int `json:"ignitionVersion"`
		Ignition struct {
			Version *string `json:"version"`
		} `json:"ignition"`
	}
	return (json.Unmarshal([]byte(userdata), &cfg) == nil && (cfg.Version != nil || cfg.Ignition.Version != nil))
}
